Finance Receivables Concentration of Credit Risk (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Concentration Risk [Line Items]
Percent of Portfolio	100.00%	100.00%
Loan Principal	$ 1,601,710	$ 1,466,680
Texas
Concentration Risk [Line Items]
Percent of Portfolio	23.00%	23.90%
Loan Principal	369,021	351,210
Florida
Concentration Risk [Line Items]
Percent of Portfolio	15.40%	16.60%
Loan Principal	247,281	243,024
North Carolina
Concentration Risk [Line Items]
Percent of Portfolio	9.90%	10.30%
Loan Principal	157,670	150,920
Georgia
Concentration Risk [Line Items]
Percent of Portfolio	7.60%	7.30%
Loan Principal	122,027	106,415
Arizona
Concentration Risk [Line Items]
Percent of Portfolio	6.80%	7.60%
Loan Principal	108,792	112,097
Virginia
Concentration Risk [Line Items]
Percent of Portfolio	6.70%	7.30%
Loan Principal	106,749	106,715
Tennessee
Concentration Risk [Line Items]
Percent of Portfolio	4.60%	3.90%
Loan Principal	72,967	56,925
California
Concentration Risk [Line Items]
Percent of Portfolio	4.40%	4.90%
Loan Principal	71,005	72,137
Nevada
Concentration Risk [Line Items]
Percent of Portfolio	4.00%	4.60%
Loan Principal	63,346	67,631
South Carolina
Concentration Risk [Line Items]
Percent of Portfolio	3.60%	2.60%
Loan Principal	58,163	37,987
New Mexico
Concentration Risk [Line Items]
Percent of Portfolio	3.00%	3.60%
Loan Principal	48,421	53,484
Alabama
Concentration Risk [Line Items]
Percent of Portfolio	2.80%	1.70%
Loan Principal	44,787	25,455
Oklahoma
Concentration Risk [Line Items]
Percent of Portfolio	2.30%	1.90%
Loan Principal	36,109	28,229
Colorado
Concentration Risk [Line Items]
Percent of Portfolio	2.20%	2.80%
Loan Principal	35,268	40,558
Indiana
Concentration Risk [Line Items]
Percent of Portfolio	1.30%	0.50%
Loan Principal	21,603	6,843
Ohio
Concentration Risk [Line Items]
Percent of Portfolio	1.10%	0.10%
Loan Principal	17,417	1,206
Mississippi
Concentration Risk [Line Items]
Percent of Portfolio	1.00%	0.40%
Loan Principal	15,847	5,844
Arkansas
Concentration Risk [Line Items]
Percent of Portfolio	0.20%	0.00%
Loan Principal	3,218	0
Missouri
Concentration Risk [Line Items]
Percent of Portfolio	0.10%	0.00%
Loan Principal	$ 2,019	$ 0